mk nghĩ phải CM chia hết cho 57 chứ  

7⁹⁹+7⁹⁸+7⁹⁷ 

=7⁹⁷(7²+7+1)

=7⁹⁷.57 chia hết cho 57  có lẽ vậy

\(\frac{x+8}{x+1}=\frac{x+7+1}{x+1}=\frac{x+1}{x+1}+\frac{7}{x+1}\)

\(\Rightarrow x+1\in\text{Ư}\left(7\right)=\left\{1;7;-1;-7\right\}\)

\(\Rightarrow x\in\left\{0;6;-2;-8\right\}\)

n = 1 

=> P = 15  không chia hết cho 24

\(M=1+3+3^2+3^3+....+3^{47}+3^{48}+3^{49}\)

\(M=\left(1+3+3^2\right)+...+\left(3^{47}+3^{48}+3^{49}\right)\)

\(M=13\left(1+....+17\right)⋮13\left(\text{đ}pcm\right)\)

Nhờ thầy @phynit

1. Look at the house.

2. There is a big yard in front of the house.

3. There are many trees behind the house.

4. There is a well at the left of the house.

5. To the right of the house, there is a flower garden.

6. I live in a house.

7. There are many people on the street.

8. They live near a restaurant.

9. Their house is next to a bookstore.

10. His father works in a factory.

Anh chàng may đồ nói:

được anh về đi, tôi sẽ nhuộm màu 

Anh kia nói:

được vậy khi nào tôi đến lấy áo?

Anh chàng may đồ nói:

Trừ thứ 2,3,4,5,6,7 và chủ nhật còn ngày nào lấy cũng được

1. Will you be free tomorrow morning?

2. There aren't any students in my class.

3. My new school is bigger than my old school.

4. Why is Hoa unhappy? - Because she misses her parents.

5. Her date of birth is on the twelfth May.